Singular and plural processing times

This is in response to issue #373 . I apologize if I'm violating any contribution guidelines. Let me know if I can improve this, stylistically or otherwise.

Edit: The additional commit takes into consideration that some pages, such as the Broadcasting Board of Governors, have 0 working days as their median processing time. It is also more efficient. : )

Thanks,
Ian
You could probably reduce the scope of the if/else to just the working day/working days line. That way the list element tags don't have to be repeated.